Lock washer



Ju 1933- c. c. WORTHINGTON ,9 90 4 LOCK WASHER Filed March 25, 1930 W mm WWW"

IN VEN TOR. M Z

Ma I TTORNEYS.

Patented June 20, 1933 p, I

NETED STATES PATENT CHARLES C. WOR'II-IINGTON, F DUNFIELD, NEW J ERSEY LOCK WASHER Application filed March 25, 1930. Serial No. 438,665.

The object of the invention is a substitute able tabs 8, two of which (marked 9 in Figs. for the common cotter pin as used for se- 1 and 2) are bent up one on each side of curing nuts against backing off their bolts the pin so as to engage the same laterally and for like purposes and consists in an or sufficiently close to it to prevent or limit 5 interlocking pin and washer combinationorrotation of the washer on the bolt. An-

ganized to fulfill all of such purposes withother of the tabs in Figs. 1 and 2) is bent out the disadvantages inherent in split-pins, up so as to overlie the head of the pin and such as difficulty of removal and of re-inserobstruct its withdrawal from the hole, and tion. It contemplates generally a washer the tabs are so related on the body of the adapted to be passed over a bolt or the like disc, in this form, that when the end of the Go and located as usual with respect to a nut pin registers with the notch between two or some other member and to be locked tabs, the head of the pin registers with the against removal by a pin passing through center of a tab, i. e. there is an odd number or projecting from the bolt, which pin is of tabs on the disc. In this way the interitself retained in place by the washer. The locked pin and washer prevent the nut from principle of organization is capable of embacking off the bolt, except to the extent of bodiment in several different practical any lost motion that may be present before forms, as will presently be made apparent. the nut backs the washer against the pin,

In the accompany drawing, Fig. 1 is an and even this motion, usually slight, may be elevation of a preferred form of the inprevented if desired, by bending downwardvention used for locking a hex nut, Fig. 2 a 1y or in a reverse direction, one or more of plan of the same, Fig. 8 an elevation of the the remaining tabs (11 in Figs. 1 and 2) into washer before being bent, Fig. 4 a perspecengagement with the adjacent nut faces, so tive view of a different application of the that in the result, the bolt, washer and nut invention and Fig. 5 one of the other pos are all interlocked against relative rotation. sible forms of the invention. As will be apparent, it is not necessary to In Figs. 1 and 2, numerals 1 and 2 indicate repeat all of these operations if the nut is two members intended to be united by a bolt to be removed and replaced, for the reason 3 and nut 4. The bolt has a transverse hole that by bending down tab 10, the pin can be p 30 5, which may be the usual cotter hole and withdrawn, thereby permitting removal of 8 which preferably passes clear through the the washer, and the unscrewing of the nut bolt adjacent the nut but far enough above and in reassembling these steps are reversed it to leave the hole clear for the insertion of and the parts again locked by bending tab a pin 6 above washer 7. If the hole is 10 back to the position shown over the head drilled all the way through the bolt, the pin of the pin. In the event of a particular is preferably headed or deformed in any head tab, or any of the other tabs, being suit-able way to limit its movement into the broken or badly deformed from repeated hole. An ordinary wire nail will serve the bending, it is a simple matter to change the purpose, which is merely to block movement position of the washer relative to the pin of the washer on the bolt. and make use of other tabs previously idle, 93 The washer can be variously designed to and for this reason it is preferred to make accomplish the desired result but in any the device with a continuous series of tabs event is a sheet ,metal disc stamped out of all around its circumference. ordinary rolled sheet metal stock with an The washer can be applied to any of the appropriate bolt opening which may be conpurposes for which cotter pins are ordinarily siderably larger than the bolt if desired, employed. Fig. 4: illustrates a hinge joint since the washer has no direct locking conbetween two members 12 through the nection with the bolt. In the preferred knuckles of which passes a bolt member or form illustrated in Fig. 3, the periphery of stud 13 held in place by means of a simthe disc is formed with a plurality of bench ilarly interlocked pin and washer instead of 1-00 till the usual cotter. Inasmuch as no nut is used in this joint the washer tabs are bent into engagement with the pin only.

In the form of Fig. 5 a single tab 14, apertured to receive the projecting end of the pin, serves the same purpose as the two tabs 9 of Fig. 4 and the diametrically opposite tab 15 when bent up prevents removal of the pin, as before.

Having now described my invention, I claim:

1. The combination with a bolt member having a hole therein, of a washer on said member, a pin located in said hole and projecting therefrom to block movement of the washer longitudinally of said member, and an interlock between the pin and washer comprising means carried by the washer arranged to limit the rotation of the washer relatively to the bolt member and prevent withdrawal of the pin from said hole.

2. The combination with abolt member having a transverse hole therein, of a washer on said member, and a pin located in said hole and projecting therefrom to block movement of the washer, the latter having an upstanding portion for lateral engagement with the pin to obstruct rotation of the washer on the bolt member and a second upstanding portion adapted to overlie the end of the pin and obstruct withdrawal of the pin from the hole.

3. The combination with a bolt member having a transverse hole therethrough, of a washer on said member and a headed pin passing through said hole and projecting therefrom to block movement of the washer, the latter having two bent-up tabs for lateral engagement with the pin one on each side thereof, to obstruct rotation of the washer on the bolt member and a bent-up tab adapted to overlie the pin-head and obstruct withdrawal of the pin from the hole.

4. The combination with a bolt and nut, the former having a pin hole therethrough adjacent the nut, a washer on said bolt intermediate the nut and the hole, and a headed pin passing through the hole and projecting therefrom to block movement of the washer, the latter having an upstanding portion for lateral engagement with the pin to prevent rotation of the washer on the bolt, a second upstanding portion adapted to overlie the pin head, and a reversely bendable portion engageable with the nut faces, whereby bolt, washer and nut may be interlocked against relative rotation.

In testimony whereof, I have signed this specification.

CHARLES C. WORTHINGTON. 

